[U-Boot] configs: move CONFIG_SPL_TEXT_BASE to Kconfig

[Simon Goldschmidt]

Hi Marek,

Am 14.11.2018 um 19:51 schrieb Simon Goldschmidt:
> On 07.10.2018 02:49, Tom Rini wrote:
>> On Sun, Sep 30, 2018 at 02:31:53PM +0200, Simon Goldschmidt wrote:
>>
>>> Moved CONFIG_SPL_TEXT_BASE to common/spl/Kconfig with
>>> help from moveconfig.py (only had to prepare socfpga,
>>> stm32f746 and am33x/43x manually)
>>>
>>> Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt at gmail.com>
>>> ---
>>>
>>> This patch is in preparation for boot-from-FPGA for
>>> socfpga cyclone5, where we need a different SPL_TEXT_BASE.
>>> By moving this to Kconfig, this can then be done via
>>> defconfig.
>>>
>>> I did notice that some defconfig files change more than
>>> necessary, it seems like they are out of sync?
>> So, I see at least one set of problems with the conversion, the am33*
>> family gets put to 0x0 which isn't right.  I'm going to pull out the
>> print tool I made and posted a while back and use that for conversion.
>> Thanks for the starting point!
> 
> Tom, what's the status on this? I still can't build an SPL for socfpga
> gen5 boot from FPGA because I can't change SPL_TEXT_BASE.
> 
> Marek, if getting CONFIG_SPL_TEXT_BASE into 2019.01 won't work, can we
> have a separate (k)config option for socfpga only? That might be useful
> anyway as when booting from fpga, there is no 64 KByte size limit and
> the "magic value into magic register to unlock support for issuing warm
> reset" must not be written as the SPL is not in SRAM. But that might
> have its separate config option, too...
> 
> Anyway, I just need input to know in which direction I should continue.
> I'm waiting to get all our versions of SPL and U-Boot running from
> mainline (with only board configs added for our private boards).

I still cannot build an SPL to boot from FPGA since CONFIG_SPL_TEXT_BASE 
is hard-coded to OnChip RAM (while when booting from FPGA, it has to be 
placed into the FPGA bridge).

Since both Tom and myself did not seem to have immediate luck with 
bringing CONFIG_SPL_TEXT_BASE to Kconfig, may I suggest to add a Kconfig 
option 'Boot from FPGA' for socfpga_gen5?

Or do you have another idea at hand of how to proceed here?

Please note that there might be other settings that may change when 
booting from FPGA, e.g. the maximum code size for SPL is not limited any 
more.

Regards,
Simon